Not sure to the exact reason behind the spacers but I can assure you they are safe and done correctly. This is THE premiere shop in Colorado and like someone mentioned above there is no way the owner would be using anything that wasn't safe and done exceptionally well.

With that being said, it is also worth noting that a lot of the bikes they sell do have numerous spacers albeit they're used with threadless stems. I've included some examples you can find in their shop at the moment. I want me a Pegoretti real bad

I know they pride themselves on bike fit and my assumption is that this is providing a slightly more upright and comfortable fit for the rider. Not really sure? I'd also say a fair number of their clients are getting up there in age. So I guess that would make sense in that regard.

Either way, enjoy the modern eye candy!